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Commit 2edfcb51 authored by Shivaraj Shetty's avatar Shivaraj Shetty Committed by Dhaval Patel
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msm: mdss: fix backlight issue on blank-unblank 



In charging mode if charging code is not updating
the backlight then backlight will be turned off in
blank call and will not be turned on again on unblank.
Same is seen during ESD recovery. Set the unset
backlight level to the current backlight level during
blank so that after unblank, on first commit the
backlight value is restored. Also initialize the
brightness level to half of the max brightness.

Change-Id: Iee29b00a5e0fbbd4fee9d2c0dae1a40222b43939
Signed-off-by: default avatarShivaraj Shetty <shivaraj@codeaurora.org>
parent 32829884

drivers/video/msm/mdss/mdss_fb.c

+10 −3
Original line number Diff line number Diff line
@@ -282,7 +282,7 @@ static void mdss_fb_set_bl_brightness(struct led_classdev *led_cdev, 


static struct led_classdev backlight_led = {

	.name           = "lcd-backlight",

	.brightness     = MDSS_MAX_BL_BRIGHTNESS,

	.brightness     = MDSS_MAX_BL_BRIGHTNESS / 2,

	.brightness_set = mdss_fb_set_bl_brightness,

	.max_brightness = MDSS_MAX_BL_BRIGHTNESS,

};
@@ -948,7 +948,12 @@ static int mdss_fb_probe(struct platform_device *pdev) 
	mfd->mdp_fb_page_protection = MDP_FB_PAGE_PROTECTION_WRITECOMBINE;



	mfd->ext_ad_ctrl = -1;

	if (mfd->panel_info && mfd->panel_info->brightness_max > 0)

		MDSS_BRIGHT_TO_BL(mfd->bl_level, backlight_led.brightness,

		mfd->panel_info->bl_max, mfd->panel_info->brightness_max);

	else

		mfd->bl_level = 0;



	mfd->bl_scale = 1024;

	mfd->bl_min_lvl = 30;

	mfd->ad_bl_level = 0;
@@ -1498,7 +1503,7 @@ static int mdss_fb_blank_blank(struct msm_fb_data_type *mfd, 
	int req_power_state)

{

	int ret = 0;

	int cur_power_state;

	int cur_power_state, current_bl;



	if (!mfd)

		return -EINVAL;
@@ -1531,8 +1536,10 @@ static int mdss_fb_blank_blank(struct msm_fb_data_type *mfd, 
		if (mfd->disp_thread)

			mdss_fb_stop_disp_thread(mfd);

		mutex_lock(&mfd->bl_lock);

		current_bl = mfd->bl_level;

		mdss_fb_set_backlight(mfd, 0);

		mfd->bl_updated = 0;

		mfd->unset_bl_level = current_bl;

		mutex_unlock(&mfd->bl_lock);

	}

	mfd->panel_power_state = req_power_state;